Comparative analysis of aluminium core honeycomb with 3D woven Kevlar honeycomb composite

Tripathi, Lekhani; Behera, B.K.

doi:10.1080/02670836.2023.2180601

Cited by 9 publications

(1 citation statement)

References 45 publications

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“…Drawing inspiration from the natural honeycomb structure, the periodic topological distribution of Honeycomb composites contributes to outstanding impact resistance, negative Poisson's ratio, negative thermal expansion, and negative stiffness [2]. Honeycomb structures across various industries have highlighted the necessity for advancements in aircrew helmet liner technology [3]. Given the potential risk of head trauma from sharp fragments, ensuring flight crew safety remains a top priority, necessitating specialized helmet liners for enhanced protection.…”

Section: Introductionmentioning

confidence: 99%

A comparative analysis of 3D woven honeycomb-based aircrew helmet liners against Nomex and Aluminum alternatives

Singh,

Behera,

Thakur

et al. 2024

Phys. Scr.

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This study investigates the energy dissipation efficiency of an aircrew helmet liner developed using 3D woven honeycomb structural composites compared to different commercially available honeycomb liner materials such as Nomex, and Aluminium. In contrast to liners with discrete density differences, the use of a honeycomb-based liner reduces the concern about delamination, back face deformation and fracture propagation. The research involves comparing several parameters related to crashworthiness, such as specific energy absorption (SEA), crush force efficiency (CFE), and margin of safety, which are crucial for head protection and ensuring helmet injury tolerance. These parameters play a vital role in assessing the ability of different configurations of the honeycomb liner during impacts. Flatwise compression and dynamic impact tests were conducted to evaluate the helmet liner's performance while maintaining consistency in the helmet shell component. Finite element analysis (FEA) and 3D X-ray Tomography techniques were utilized to analyse the back face deformation (BFD) at high-velocity impact and the internal damage resulting from impacts on the helmet liners, respectively. The results revealed that the 3D woven honeycomb liner configuration performs optimally in terms of energy absorption by demonstrating sufficient and balanced competency across these three critical factors. Additionally, the simulation result revealed that the 3D woven honeycomb liner exhibits wave propagation. This phenomenon enhances its energy absorption capacity and reduces back-face deformation attributed to its crushing behaviour. This research offers valuable insights for improving the performance of aircrew helmet liners, with a particular focus on utilizing 3D woven honeycomb liners featuring 3D woven solid structure to maintain exceptional structural integrity.

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Section: Introductionmentioning

confidence: 99%

A comparative analysis of 3D woven honeycomb-based aircrew helmet liners against Nomex and Aluminum alternatives

Singh,

Behera,

Thakur

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

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Biomimetic Stiff Nanocomposite for High‐Strength Structural Material

Liu,

Zhao,

Zhong

et al. 2024

Adv Funct Materials

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The honeycomb structure stands out as an exemplary material, characterized by its remarkable combination of lightweight and superior mechanical strength. Drawing inspiration from the roles of cellulose nanofiber and lignin in natural wood, a novel high‐stiffness biomass honeycomb nanocomposite is developed. This composite is engineered by incorporating lignin into bacterial cellulose, followed by the self‐polycondensation of lignin at elevated temperature. The nanocomposite architecture features intricately interwoven nanofibers to provide a robust long‐range framework, while the self‐polymerized lignin through coniferyl alcohol radicals serves as a rigid binder that interlinks the nanofibers. The dual mechanisms endow the material with exceptional tensile strength and rigidity. Molding this nanocomposite into a honeycomb structure yields a material with outstanding mechanical properties that outperform commercial alternatives, including those derived from Nomex paper and aluminum alloys. Given its characteristics, this nanocomposite holds great promise as a substrate for the next generation of high‐performance structural materials.

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Surface engineering of textile structural composites with ZnO nanorods and graphene nanofillers for aircrew helmet applications

Singh,

Behera

2024

Polymer Composites

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This research aimed to augment the properties of interfibre interfaces through surface treatment with ZnO nanorods while simultaneously modifying the matrix with graphene nanoplatelets. The strategic approach of this research focused on synergizing these interventions to enhance the mesomechanical, and macromechanical properties, which are specifically targeted at improving the performance of aircrew helmets. This study investigated the effectiveness of these enhancements in improving the mechanical performance of aircrew helmets. The synergy of integrating ZnO nanorods and doped GNPs into Kevlar fabric resulted in a 29% increase in impact energy absorption compared to that of the standard Kevlar composite. Furthermore, the composite samples underwent thorough analysis through techniques such as thermogravimetric analysis (TGA), Raman spectroscopy, Fourier‐transform infrared spectroscopy (FTIR), dynamic mechanical analysis (DMA), and scanning electron microscopy (SEM) imaging. The findings indicate that incorporating 1% graphene nanofillers into Kevlar during the fourth seed cycle of ZnO treatment yields favorable mechanical performance characteristics. SEM at 50 KX magnification provided detailed visualization of the ZnO nanorods grafted onto the fabric substrates, with subsequent evaluation of the morphological damage and fractography of the impacted composites. The findings of this research hold significance for advancing the understanding of composite material behavior under impact loads and contribute to ongoing efforts to enhance the durability and performance of structural composites in diverse applications.Highlights Synergistic treatment with ZnO nanorods and graphene nanoplatelets boosted Kevlar composite properties for aircrew helmets. Adding 1% graphene during ZnO treatment increased impact energy absorption by 29%. Comprehensive analysis validated treatment efficacy, showing substantial mechanical improvements. The research advances composite understanding, paving the way for durable, high‐performance materials for applications like aircrew helmets.

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Comparative analysis of aluminium core honeycomb with 3D woven Kevlar honeycomb composite

Cited by 9 publications

References 45 publications

A comparative analysis of 3D woven honeycomb-based aircrew helmet liners against Nomex and Aluminum alternatives

A comparative analysis of 3D woven honeycomb-based aircrew helmet liners against Nomex and Aluminum alternatives

Biomimetic Stiff Nanocomposite for High‐Strength Structural Material

Surface engineering of textile structural composites with ZnO nanorods and graphene nanofillers for aircrew helmet applications

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